[英]Node: How to restructure nested JSON data getting and organize reusable?
使用Node請求模塊,我通過URL獲取JSON數據。 JSON文件嵌套在多個級別中,並且沒有以可重復使用的方式進行組織。 當前的JSON如下所示:
{
"data": {
"series": {
"brochure_image": "range.jpg",
"background_image": "range.jpg",
"Model 1": {
"medium_images": "Model_1.png",
"brand": "Tesla",
"Model 101": {
"medium_images": "Model_101.png",
"brochure_image": "Model_101.png",
},
"Model 102": {
"medium_images": "Model_102.png",
"brochure_image": "Model_102.png",
}
},
"Model 2": {
"medium_images": "Model_2.png",
"brand": "Tesla",
"Model 201": {
"medium_images": "Model_201.png",
"brochure_image": "Model_201.png",
}
}
}
}
}
我想進行重組,以便可以輕松地從前端訪問數據。 我想這樣改變:
[
{
"series":"Model 1",
"model": [
{
"modelName": "Model 101",
"medium_images": "Model_101.png",
"brochure_image": "Model_101.png"
},
{
"modelName": "Model 102",
"medium_images": "Model_102.png",
"brochure_image": "Model_102.png"
}
]
}
{
"series":"Model 2",
"model": [
{
"modelName": "Model 201",
"medium_images": "Model_101.png",
"brochure_image": "Model_101.png"
}
]
}
]
我怎樣才能做到這一點? 我的節點server.js參與如下:
const dataUrl = "http://example.com/data/series-data.json";
// API
app.get("/api/getSeriesData", (req, res) => {
request.get(dataUrl, (error, response, body) => {
var json = JSON.parse(body);
var seriesObj = json.data.series;
var seriesArr = [];
for (var series in seriesObj) {
if (seriesObj.hasOwnProperty(series)) {
seriesArr.push({"series": series, "model": seriesObj[series]});
}
}
res.send(seriesArr);
});
});
您可以執行以下操作:
var obj = { "data": { "series": { "brochure_image": "range.jpg", "background_image": "range.jpg", "Model 1": { "medium_images": "Model_1.png", "brand": "Tesla", "Model 101": { "medium_images": "Model_101.png", "brochure_image": "Model_101.png", }, "Model 102": { "medium_images": "Model_102.png", "brochure_image": "Model_102.png", } }, "Model 2": { "medium_images": "Model_2.png", "brand": "Tesla", "Model 201": { "medium_images": "Model_201.png", "brochure_image": "Model_201.png", } } } } }; var result = []; Object.keys(obj.data.series).forEach(key => { if(key.indexOf("Model") === 0){ var o = {series: key, model:[]}; Object.keys(obj.data.series[key]).forEach(k => { if(k.indexOf("Model") === 0){ o.model.push({modelName: k, medium_image: obj.data.series[key][k].medium_image, brochure_image: obj.data.series[key][k].brochure_image}); } }); result.push(o); } }); console.log(result);
這樣做是循環遍歷.data.series
和data.series[MODEL NAME]
所有屬性,並且僅考慮那些屬性名稱以Model開頭的值。 如果並非所有您感興趣的值的屬性名稱都以Model開頭,則此方法將行不通。 在這些情況下,您可能必須使用否定斷言(檢查其屬性名稱是否不是您不感興趣的已知名稱之一)。
這是我的解決方案。
我們可以刪除對象中不需要的keys
,然后遍歷對象屬性並將其添加到數組中。
請仔細閱讀摘要,如果您遇到任何問題或疑問,請告訴我。
var data = { "data": { "series": { "brochure_image": "range.jpg", "background_image": "range.jpg", "Model 1": { "medium_images": "Model_1.png", "brand": "Tesla", "Model 101": { "medium_images": "Model_101.png", "brochure_image": "Model_101.png", }, "Model 102": { "medium_images": "Model_102.png", "brochure_image": "Model_102.png", } }, "Model 2": { "medium_images": "Model_2.png", "brand": "Tesla", "Model 201": { "medium_images": "Model_201.png", "brochure_image": "Model_201.png", } } } } }; var output = []; delete data.data.series.brochure_image delete data.data.series.background_image for (k in data.data.series) { var temp = []; delete data.data.series[k].medium_images; delete data.data.series[k].brand; for (j in data.data.series[k]) { temp.push({ modelName: j, medium_images: data.data.series[k][j].medium_images, brochure_image: data.data.series[k][j].brochure_image }); } output.push({ "series": k, model: temp }); } console.log(output);
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